Dragon Tempest is a uncommon Enchantment card from Game Night: Free-for-All (GN3), collector number 74. Current market price: $4.29, TCGplayer market prices via Scryfall.
Whenever a creature you control with flying enters, it gains haste until end of turn. Whenever a Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control.